Razor-sharpening machine.



E. A. CONWAY.

RAZOR SHARPENING MACHINE. APPLICATION FILED 056.113.1916.

1,223,672, Patented Apr. 24, 1917.

2 SHEETS-SHEET I.

inventor Witnesses E. A. CONWAY.

RAZOR SHARPENING- MACHINE.

APPLICATION FILED DEC. 13. 1916.

Patented Apr. 24, 1917.

2 SHEETS-SHEET 2- Witnesses nventor UNTTED STATES FATEN T FFT@l:l.

ELISHA A. CONWAY, 0F WILLIAMSPORT, PENNSYLVANIA, ASSIGNOR OF ONE-HALF T0 JOHN E. WALTZ, 0F WILLIAM-SPORT, PENNSYLVANIA.

RAZOR-SHARPENENG MACHINE.

Leashes.

Application filed December 13, 1916.

To all whom it may concern:

Be it known that I, ELIsHA A. CONWAY, a citizen of the United States, residing at Williamsport, in the county of Lycoming and State of Pennsylvania, have invented a new and useful Razor-Sharpening Machine, of which the following is a specification.

The present invention appertains to sharpening devices, and aims to provide a novel and improved machine for sharpening razor blades and the like.

It is the object of the invention to provide a machine by means of which razor blades can be honed and stropped in a convenient and practical manner, and with the diagonal stroke of the honing and stropping surfaces past the edge of the blade, the machine being adjustable in order that when the blades are being honed, their edges will be presented to the hone in the proper manner, and when the blades are being stropped, the edges of the blades will be in a trailing position for stropping. i

Another object of the invention is the provision of novel means in a machine of the character indicated for regulating the pressure of the blade a ainst the hone or strop.

It is also the ob ect of the invention to provide a machine of the nature .indicated which is comparatively simple and ineX- pensive in construction, which can be used by the inexperienced for quickly and effectively sharpening razor blades, and which will serve its office in a thoroughly satisfactory and efficacious manner.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed'can be made within the scope of what is claimed without departing from the spirit of the invention.

The invention is illustrated in the accompanying drawings, wherein Figure 1 is a side elevation of the improved sharpening machine.

Fig. 2 is a central vertical section taken on the line 22 of Fig. 3, portions being shown in elevation,

Patented Apr. 24,

Serial no; 136,693.

Fig. 3 is a front view of the device. Flg. 4 1s a horizontal section. taken on the line 44 of Fig. 3.

Fig. 5 is an enlarged sectional detail taken on the line 55 of Fig. 1.

Fig. 6 is a fragmental perspective view to lllustrate the spring and key of the blade holder.

Fig. 7 is a fragmental perspective view of I the blade holder pinion.

Fig. 8 is a side elevation of another form of blade holder.

1n carrying out the invention, there is provided a suitable frame embodying the base 1 and having the standard 2 provided with the horizontal bearing 3 in which a stub shaft 4 is journaled for rotation. A crank 5 is attached to one end of said shaft 4 in order that the shaft can be rotated manually, although it can be rotated by a prime mover if desired. Attached to the other end of the shaft 4 is a rotary disk 6 disposed in a vertical plane, and having the annular outstanding flange 7 about its margin providing a recess for receiving and holding the hone 8 which is in the form of a disk. The flange 7 is provided with lugs 9 for the attachment of a disk-shaped strop 10 which is placed against the hone 8, the strop being held in place by means of screws 11 or other suitable securing means taking into the lugs 9. When honing, the disk strop 10 is removed, and said strop is applied to the face of the hone when stropping.

The disk 6 has a central stud 12 located within a central aperture of the hone 8, and a shouldered screw 13 is threaded into the stud 12 coaxial with the shaft 4, and a bearing 14 is fitted loosely upon the projecting portion of the screw 13 and has an outstanding bracket 15 provided with apertures 16 and 17 in vertical lines with the respective apertures 18 and 19 with which the base 1 is provided. A vertical oscillatory blade can be used for various razor blades, in ordglr'that all types of blades can be sharpene In order to turn the holder 20 for pressing the blade against the hone or strop, and in ordervto reverse the holder 20 when the direction of rotation of the hone or strop is reversed, there is provided a vertical shaft or spindle 24 having its lower end journaled in the base and having its upper end journaled in the bearing 3. A pair of spur gears 25 and 26 secured to each other are rotatable loosely upon the shaft 24 and rest upon the base 1. A spider-shaped pressure spring 27 has its arms bearing upon the spur gear 25 and its central portion has an aperture through which the shaft 24 extends, and said shaft has a shoulder 28 bearing upon spring 27. A jam screw 29 is threaded into the bearing 3 and bears against the upper end of the shaft 24 for pressing it downwardly with the desired I tension on the spring 27. This screw 29 can be readily adjusted for regulating the tension or pressure of the spring 27, and the screw 29 is held in any adjusted position by means of a lock nut 30 thereon. A pinion 31 mounted upon the base 1 meshes with the spur gear 26, and a reversible pinion 32 is assembled with the lower trunnion 22 of the blade holder 20. This pinion 32 has a hub or collar 33 projecting from one face thereof and the pinion and its hub have a key seat 34 for receiving a key 35 with which the trunnion 22 of the blade holder is provided. The trunnion 22 has a shoulder 36 at the upper end of the key 35. When the pinion 32 is slipped onto the trunnion 22 with the hub 33 uppermost, said hub in seating against the shoulder 36 will space the pinion 32 therefrom in order that it will be in the plane of the pinion 31 to mesh therewith, as seen in Figs. '1 and 2. When thepinion 32 is removed and reversed, with the hub 33 lowermost, the pinion can seat against the shoulder 36 and will be in a higher plane or in the plane of the spur gear 25 aging the key seat 34 causing the pinion 32 and blade holder20 to rotate or oscillate in unison. v A leaf spring 37 is secured to the holder 20 near its lower end and is adapted to bear against upstanding stop lugs 38 with which the base is provided, the spring 37 contactmg with the lugs before the edge of the blade 23 is brought against the face of the hone or strop.

The shaft 24 is rotated by the operation of the crank 5, a pinion 38' being carried by the shaft 24 and meshing with the gear teeth 39 of the disk 6. p

In using the machine for honing a razor blade 23, the strop 10 is removed, and the holder 20 to which the blade is applied is also removed from the bracket 15 and base presses against the to mesh therewith, the key 35 in en 1, and the pinion 32 is applied with the hub 33 lowermost. The trunnions 21 and 22 are then inserted in the respective apertures 17 and 19, with the pinion 32 in the plane of and meshing with the spur gear 25. Now, when the crank hone 8 in one direction, the shaft 24 is rotated in the corresponding direction, and the spring 27 which is keyed to the shaft 24 k the spur gear 25 and rotates it so that the of the blade 23 against the hone with its edge projecting in a direction opposite to that in which the hone rotates, thereby properly presenting the edge of the blade to the hone. When the hone is rotated in the opposite direction, the holder 20 is reversed in order that both sides of the blade can be honed by rotating the crank in opposite directions. Just before the blade 23 swings against the hone in either direction, the spring 37 contacts with one lug 38, but the friction between the spring 27 and spur gear 25 is sufficient to swing the holder 20 against the tension of the spring 37 to press the blade against the hone. The pressure of the spring 27 is regulated by adjusting the screw 29, in order that the blade will be pressed against the bone with the desired pressure before the spring 27 slips upon the spur gear 25, it being noted that after the blade is brought against the hone, will then slip around the surface of the spur gear 25. The spring 37 resists the movement of the blade against the hone or strop, while the slip spring 27 serves to move the blade against the hone or strop for overcoming the tension of the spring 37 proportionally to the tension of the spring 27 The spring 27 can be brought under greater pressure when dull blades are being sharpened, in order that they will be pressed with greater pressure against the surfaces of the hone and strop.

In order to strop the blades, the strop 10 is applied over the face of the hone, and the trunnions 21 and 22 are inserted in the apertures 16 and 18 with the pinion 32 in posi-' tion with its hub 33 uppermost shoulder 36, so that the pinion plane of and in mesh with the pinion 31. The pinion 31 rotates in a direction opposite to the direction of rotation of the spur gears 25 and 26, so that the holder 20 is now against the turned in directions opposite to those in,

5 is rotated to rotate the pinion 32 and holder 20 are given a partial rotation to swing the edge the spring 27 32 is in the which it is turned when the pinion 32 meshes with the spur gear 25 during the honing operation. Consequently, when the disk 6 is rotated for rotating the strop, ,the holder 20 is turned in the proper direction to bring the blade against the surface of the strop with its edge projecting in the direction of rotation of the strop, thereby providing a drag stropping action. The holder 20 is connected with the first mentioned esa-era reversed when the direction of rotation of the disk 6 is reversed, the same as when honing the blade, in order that the edge of the blade will be presented properly against the strop as well as the hone. Thus, by reversing the pinion 32 and properly positioning the blade holder 20, the blade holder is oscillated in the proper directions when honing and stropping, the edge of the blade projecting in a direction opposite to the direction of rotation of the hone, and projecting in the direction of rotation of the strop. It will be noted that the spring 37 is cooperable with the lugs 38 when stropping as well as honing, in order that the blade can be moved with the desired pressure against the strop.

Attention is also directed to the fact that the edge of the blade is disposed on a chordal line with respect to the hone and strop, whereby the hone and strop move past the edge of the blade on a substantially dia gonal line, which is desirable.

As illustrated, in Fig. 4-, the base 1 or other part of the frame can be provided with notches or open slots l for receiving clamping bolts or screws to which the frame can be readily applied and from which the frame can be easily removed, whereby the frame can be clamped to a supporting memher and detached therefrom as desired.

The blade holder 20 illustrated in Fig. 8 has means 2O arranged at an obtuse angle for receiving and holding the blade at a more pronounced angle with respect to the face of the sharpening disk, when this is desired. In this form, the leaf spring 37' is attached to the holder 20, as clearly seen by reference to Fig. 8.

Having thus described the invention, What is claimed as new is:

1. A sharpening machine embodying a frame having a base and a standard, a hori- Zontal shaft journaled in the standard, a vertical member carried by said shaft, a disk-shaped sharpening member carried by sald member, a vertical shaft journaled to the standard and to the base and operatively member, a vertical oscillatory blade holder having its lower end journaled to the base, the base and blade holder having cooperating means for reslstlng the movement of a blade held by the holder against the sharpening member, the resisting means being yieldable, a pinion carried by the lower portion of the blade holder, a spur gear rotatable upon the vertical shaft on the base and connected with said pinion, a pressure spring carried by the vertical shaft and bearing upon said spur gear, and means for regulating the pressure of said spring against the spur gear.

2. A. sharpening machine embodying a frame, a shaft journaled in the frame, a disk-shaped sharpening member carried by said shaft, an oscillatory blade holder for presenting a blade in reversed positions against the face of said sharpening member, a leaf spring carried by said holder, stops carried by the frame for the engagement of said spring before the blade is brought against the sharpening member, a pinion carried by the blade holder, a shaft journaled in the frame and geared to the sharpening member to rotate therewith, a spur gear rotatable upon said shaft and connected to said pinion, a spider-shaped pressure spring keyed upon said shaft and having its arms pressing against said spur gear, the shaft having a shoulder bearing against the pressure spring, and means for shifting said shaft to regulatethe tension of the pressure spring.

3. A sharpening machine embodying a rotatable sharpening member, an adjustably mounted oscillatory blade holder, a pinion keyed uponsaid holder and reversible to change its position, a rotatable shaft con-- nected to the sharpening member to rotate therewith, a pair of spur gears rotatable together loosely upon said shaft, a pressure spring rotatable with said shaft and hearing against one of the spur gears, and a pinion meshing with one of said spur gears, the first mentioned pinion being adapted to mesh with the last mentioned pinion when in one position and to mesh with the other spur gear when in its other position.

In testimony that I claim the foregoingas my own, I have hereto afixed my signature in the presence of two Witnesses.

ELISHA A. CONWAY.

Witnesses:

CHAs. F. BDELSPACHER, JOHN E. WALTZ. 

